Helix Ci5 M80FM-S3

Helix Ci5 M80FM-S3 – 80 mm Midrange with FlexMount80 and FlexConnect

The Ci5 M80FM-S3 is a 3.15″ (80 mm) advanced midrange driver from the HELIX COMPOSE platform, which re-engineers universal speakers so they combine universal flexibility with vehicle-specific advantages – “developed inside the vehicle, for the vehicle”. The i5 series sits between i7 and i3 for listeners who want true hi-fi sound; its impedances are matched to HELIX and MATCH amplifiers. The driver is intended for accurate midrange reproduction in high-quality 3-way systems and DSP setups.

A reduced outer diameter lets it fit tight OEM openings without sacrificing cone area. The silicon-coated paper cone provides high internal damping, a narrow inward-folded surround allows large linear excursion, an aluminum dustcap improves the upper midrange and a push-pull neodymium magnet system ensures efficiency and low distortion. The FlexConnect terminal plugs into factory harnesses via vehicle-specific adaptors with reverse polarity protection.

Key Features

• 80 mm midrange: 3.15″ driver with versatile mounting options for 3-way systems.
• 3 Ω technology: more amplifier output and efficiency with HELIX and MATCH amplifiers.
• Silicon-coated paper cone: high internal damping for good impulse and frequency response.
• Aluminum dustcap: improves upper-midrange response.
• Rubber surround: narrow, inward-folded design with optimized magnet for large linear excursion (Xlin ±2.5 mm).
• Larger effective cone area: smaller installation diameter and larger effective cone area than typical 80 mm speakers.
• Push-pull neodymium magnet: high efficiency and low distortion.
• Glass-bead reinforced polymer basket: rigid, low ringing, reduced flux modulation, heat resistant.
• FlexConnect terminal: automotive-grade plug connection with reverse polarity protection.
• FlexMount80 rings included: two universal rings (CFM80 MULTI.1 & MULTI.2) for car-specific or universal fitting, plus mounting ring with grille.
• FlexMount100 option: with the optional CFMK80-100 adaptor ring, car-specific FlexMount100 adaptors can be used.
• WireKits ready: optional car-specific cables for non-destructive installation.

Drivers & Construction

• Cone: silicon-coated paper, cone area (Sd) 36 cm².
• Dustcap: aluminum.
• Voice coil: 20 mm diameter, 7 mm winding height.
• Magnet: push-pull neodymium system.
• Basket: polymer composite reinforced with glass beads.
• Terminal: FlexConnect.

Acoustic Performance

• Power handling: 90 W RMS / 135 W max.
• Impedance: 3 Ω (DC resistance 3.1 Ω).
• Sensitivity: 92 dB @ 2.83 V / 1 m; 88 dB @ 1 W / 1 m.
• Frequency response: 200 – 6,000 Hz.
• T/S parameters: Fs 156 Hz, Qms 3.68, Qes 0.75, Qts 0.63, Vas 0.7 l, Cms 407 µm/N, BxL 3.2 Tm, Mms 2.6 g, Rms 0.68 kg/s.
• Excursion: max. linear excursion (Xlin) ±2.5 mm; max. mechanical excursion (Xmax) ±4.5 mm.

Installation Notes

• Dimensions: outer diameter 78.5 mm (3.09″), 88.9 mm (3.50″) with universal mounting ring; installation diameter 69.5 mm (2.74″); installation depth 30.2 mm (1.19″).
• Included parts: universal FlexMount rings CFM80 MULTI.1 & MULTI.2, universal connection cable, FlexConnect inlay set (A, B, C, D), speaker gasket and mounting ring with grille.
• Compatible accessories: FlexMount80, FlexMount100 (with optional CFMK80-100), FlexConnect inlays and WireKits.

Technical Specifications

Scope of Delivery

2 x Ci5 M80FM-S3
2 x Universal FlexMount CFM80 MULTI.1 & MULTI.2
2 x Universal connection cable
2 x FlexConnect inlay set (A, B, C, D)
2 x Speaker gasket
2 x Mounting ring with grille
1 x Mounting material